Supplemental battery for an electronic watch



FIG. 1 is a top perspective view of a supplemental battery for anelectronic watch;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 rear elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the drawings illustrate portions of thesupplemental battery for an electronic watch, as shown and described.

CLAIM The ornamental design for a supplemental battery for an electronicwatch, as shown and described.